摘要
研制了一种基于光纤布拉格光栅(FBG)和非本征法布里-珀罗干涉仪(EFPI)的高精度井下长期在线温度压力监测系统。该系统通过EFPI的腔长变化监测压力,通过FBG的波长变化监测温度,同时实现对压力的温度补偿。标定结果表明,该系统的压力测量范围为0.1~42 MPa,压力灵敏度为203.8 nm/MPa,精度为±0.05%F.S(F.S表示满量程),压力分辨率达到0.0007 MPa。将该系统在胜利油田桩西某生产井进行了工程示范,实时监测井下温度和压力5个月。结果表明,该系统能反映油井生产状态,实现重要参数的在线监测,对提高油气采收率具有重要指导意义。
A highprecision longterm online downhole temperature and pressure monitoring system based on optical fiber Bragg grating(FBG)and extrinsic FabryPérot interferometer(EFPI)is developed in this paper.The system monitored the pressure through the change in the EFPI cavity length and the temperature through the change in the FBG wavelength,and simultaneously realized the temperature compensation of the pressure.Calibration results showed that the system has the pressure measurement range of 0.1‒42 MPa,the pressure sensitivity of 203.8 nm/MPa,the precision of±0.05%F.S(F.S means full scale),and pressure resolution of 0.0007 MPa.The system is demonstrated in a production well in Zhuangxi,Shengli Oilfield,and the downhole temperature and pressure are recorded in real time for 5 months.The results show that the system can reflect the production status of oil wells and realize the online monitoring of important parameters,which has important guiding significance for improving oil and gas recovery.
作者
杨斌
赵庆超
车传睿
安百新
张发祥
孙伟
王昕
姜邵栋
徐子文
Yang Bin;Zhao Qingchao;Che Chuanrui;An Baixin;Zhang Faxiang;Sun Wei;Wang Xin;Jiang Shaodong;Xu Ziwen(Sinopec Shengli Oilfield Company,Dongying 257000,Shandong,China;Laser Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,Shandong,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第17期118-123,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金联合基金(U2006216)
山东省重点研发计划(2019GGX104054)。
